Is Cosign or WorkOS better?

Neither clearly leads. Cosign starts at Free and WorkOS at $125/one-time per connection, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Cosign or WorkOS?

Cosign has a free tier; the other does not. Paid plans start at Free for Cosign and $125/one-time per connection for WorkOS.

Does Cosign or WorkOS run on more platforms?

Cosign runs on macOS, Linux, Windows, Docker. WorkOS runs on Web, API.

Can I use Cosign for free?

Yes. Cosign has a free tier, so you can try it without paying. WorkOS starts at $125/one-time per connection.

What is Cosign best used for?

Cosign is most often used for signing container images in a build pipeline without managing long-lived private keys, attaching a signed bill of materials to a release so consumers can verify its provenance, meeting a customer or regulatory requirement for signed artifacts, verifying third-party images before they enter an internal registry. Of those, signing container images in a build pipeline without managing long-lived private keys and attaching a signed bill of materials to a release so consumers can verify its provenance are not what WorkOS is typically brought in for.

What can Cosign do that WorkOS cannot?

Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations.

Cybersecurity · head to head

Cosign vs WorkOS

Cosign

Cybersecurity

Signs and verifies container images and artifacts, with or without managing keys

From: Free
Rated: -

Full review Website

WorkOS

Cybersecurity

Developer platform for enterprise-ready authentication and identity.

From: $125/one-time per connection
Rated: -

Full review Website

The short version

Only Cosign has a free tier, so it costs nothing to try first.
Each has a real cost: Cosign keyless signing inherits every weakness of the identity provider behind it. Sigstore’s own threat model states that if an identity provider is compromised, Sigstore will issue certificates to those identities, so a compromised account produces perfectly valid signatures.; WorkOS authKit free tier limited to 1 million monthly active users; additional millions cost $2,500/month
Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Cosign and WorkOS actually diverge.

Attributes where Cosign and WorkOS differ
Attribute	Cosign	WorkOS
Starting price	Free	$125/one-time per connection
Pricing model	Open source, no licence fee	usage-based
Free tier	Yes	No
Platforms	macOS, Linux, Windows, Docker	Web, API

Identical on both: user rating (Not yet rated), category (Cybersecurity).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Cosign

Keyless signing
Key and KMS signing
Registry-native storage
In-toto attestations
Offline verification
Trusted root and signing config

Only in WorkOS

Nothing recorded that Cosign does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Cosign

Signing container images in a build pipeline without managing long-lived private keysnot WorkOS
Attaching a signed bill of materials to a release so consumers can verify its provenancenot WorkOS
Meeting a customer or regulatory requirement for signed artifactsnot WorkOS
Verifying third-party images before they enter an internal registrynot WorkOS

WorkOS

SaaS applications needing rapid enterprise SSO deploymentnot Cosign
Companies selling to mid-market and enterprise customersnot Cosign
Applications requiring SCIM directory sync with corporate identity systemsnot Cosign
Product teams needing audit logs for compliance (SOC 2, ISO 27001)not Cosign
Platforms with multiple identity provider requirementsnot Cosign

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Cosign

Keyless signing inherits every weakness of the identity provider behind it. Sigstore’s own threat model states that if an identity provider is compromised, Sigstore will issue certificates to those identities, so a compromised account produces perfectly valid signatures.
A signature proves who signed, never whether they should have. The documentation is explicit that Sigstore cannot determine authorisation, so every consumer must write and maintain their own identity and issuer policy or verification means nothing.
Nothing is enforced without an admission controller. Signing changes what you can prove, not what runs, and the official policy controller has a small maintainer base for a component sitting in a cluster admission path.
Upgrades break pipelines. Version 3 changed defaults, version 4 is announced as removing legacy functionality and roughly half the command line flags, and two official client libraries still lacked support for the new log format as of mid 2026.
Signatures do not expire. An artifact signed before a maintainer account was compromised and one signed after are indistinguishable unless somebody is actively monitoring the transparency log, and almost nobody is.

WorkOS

AuthKit free tier limited to 1 million monthly active users; additional millions cost $2,500/month
Per-connection pricing for SSO and Directory Sync ($125–$50 each) scales poorly for enterprises with many identity providers
Audit logs require separate subscription at $125/month per SIEM connection or $99/month per 1 million events
Radar fraud protection billed separately at $100/month per 50,000 additional checks beyond 1,000 free checks
Custom domain feature requires $99/month subscription
Requires annual commitment for SLA and support guarantees; pay-as-you-go tier lacks uptime guarantee

Pricing, plan by plan

Cosign

Free

CosignFree
- Apache-2.0
- Public Sigstore infrastructure free to use
- No usage limits published

WorkOS

$125/one-time per connection

Pay as You Go$undefined/variable
- Per-connection pricing from $125 to $50 with volume discounts
- Up to 60% discount at scale
- Quick deployment
Annual Credits$undefined/variable
- Custom pricing with volume discounts
- 99.99% uptime SLA
- Guided migration

Which should you pick?

Choose Cosign if

You need keyless signing.
You want to start without paying.
You work on macOS, Linux, Windows, Docker.
You also want key and kms signing.

Cosign review

Choose WorkOS if

You work on Web, API.

WorkOS review

Questions people ask

Is Cosign or WorkOS better?: Neither clearly leads. Cosign starts at Free and WorkOS at $125/one-time per connection, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cosign or WorkOS?: Cosign has a free tier; the other does not. Paid plans start at Free for Cosign and $125/one-time per connection for WorkOS.
Does Cosign or WorkOS run on more platforms?: Cosign runs on macOS, Linux, Windows, Docker. WorkOS runs on Web, API.
Can I use Cosign for free?: Yes. Cosign has a free tier, so you can try it without paying. WorkOS starts at $125/one-time per connection.
What is Cosign best used for?: Cosign is most often used for signing container images in a build pipeline without managing long-lived private keys, attaching a signed bill of materials to a release so consumers can verify its provenance, meeting a customer or regulatory requirement for signed artifacts, verifying third-party images before they enter an internal registry. Of those, signing container images in a build pipeline without managing long-lived private keys and attaching a signed bill of materials to a release so consumers can verify its provenance are not what WorkOS is typically brought in for.
What can Cosign do that WorkOS cannot?: Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations.

Answered from the vendors’ own pages

Cosign: Does Cosign tell me if an image is vulnerable?

No. It has no vulnerability knowledge whatsoever. It can carry an SBOM as a signed attestation but never reads it. Pair it with a scanner.

WorkOS: How quickly can I implement WorkOS SSO?

Developers can implement single sign-on in minutes instead of months. Multiple customers report setting up SSO in less than a week, with WorkOS handling the complexity of SAML and OIDC protocols.

Source

Cosign: Is signing alone enough?

No. Verification is a command somebody runs. Without an admission controller enforcing it, an unsigned image still runs.

WorkOS: What SDKs does WorkOS provide?

WorkOS offers SDKs for Node.js, Python, Ruby, Go, PHP, Java, and .NET.

Source

Cosign: What does a bare cosign verify actually prove?

Very little. Without a pinned certificate identity and OIDC issuer, it accepts a valid signature from any identity at all.

WorkOS: Does WorkOS support SCIM provisioning?

Yes. WorkOS supports SCIM provisioning integration with systems like Okta and Entra ID for automated user management.

Source

Cosign: What is the risk of keyless signing?

Your OIDC provider becomes the root of trust. Compromise of that account yields genuine, verifiable signatures, so account security is the control that matters.

Cosign: Should we expect breaking changes?

Yes. Version 4 is announced to remove roughly half the flags, and a post-quantum migration is named as a further breaking change after that.

Cosign vs WorkOS

Cosign

WorkOS

The short version

Where they differ

What each one covers

Only in Cosign

Only in WorkOS

What people use each for

Cosign

WorkOS

Where each one falls short

Cosign

WorkOS

Pricing, plan by plan

Cosign

WorkOS

Which should you pick?

Choose Cosign if

Choose WorkOS if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Cosign

More on WorkOS

Keep looking

Other head to heads